Examine source code of Ex-Blu

{
  "theme": {
    "images": {
      "theme_frame": "exblue_persona.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Ex-Blu",
  "manifest_version": 2,
  "description": "ExBlue - a blue theme. This is my first persona. I'm interested in graphics and design, so I decided to create one. Enjoy!"
}